Home / 5,220.47-7,820.27-3,139.34

Finding the Fourth Proportional to 5,220.47, 7,820.27 and 3,139.34

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Solution

The fourth proportional to 5,220.47, 7,820.27 and 3,139.34 is: 4,702.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.47 : 7,820.27 = 3,139.34 : x
  2. Step 2: Convert to fraction form
    5,220.47/7,820.27 = 3,139.34/x
  3. Step 3: Cross multiply
    5,220.47x = 7,820.27 × 3,139.34
  4. Step 4: Simplify right side
    5,220.47x = 24,550,461.06
  5. Step 5: Solve for x
    x = 24,550,461.06/5,220.47
  6. Step 6: Final answer
    x = 4,702.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.